mirror of
https://github.com/noDRM/DeDRM_tools.git
synced 2024-06-23 16:06:50 +02:00
afa4ac5716
THIS IS ON THE MASTER BRANCH. The Master branch will be Python 3.0 from now on. While Python 2.7 support will not be deliberately broken, all efforts should now focus on Python 3.0 compatibility. I can see a lot of work has been done. There's more to do. I've bumped the version number of everything I came across to the next major number for Python 3.0 compatibility indication. Thanks everyone. I hope to update here at least once a week until we have a stable 7.0 release for calibre 5.0
211 lines
7.3 KiB
Python
211 lines
7.3 KiB
Python
#!/usr/bin/python
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#
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# This is a python script. You need a Python interpreter to run it.
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# For example, ActiveState Python, which exists for windows.
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#
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# Changelog drmcheck
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# 1.00 - Initial version, with code from various other scripts
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# 1.01 - Moved authorship announcement to usage section.
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#
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# Changelog epubtest
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# 1.00 - Cut to epubtest.py, testing ePub files only by Apprentice Alf
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# 1.01 - Added routine for use by Windows DeDRM
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# 2.00 - Added Python 3 compatibility, September 2020
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#
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# Written in 2011 by Paul Durrant
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# Released with unlicense. See http://unlicense.org/
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#
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#############################################################################
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#
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# This is free and unencumbered software released into the public domain.
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#
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# Anyone is free to copy, modify, publish, use, compile, sell, or
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# distribute this software, either in source code form or as a compiled
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# binary, for any purpose, commercial or non-commercial, and by any
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# means.
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#
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# In jurisdictions that recognize copyright laws, the author or authors
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# of this software dedicate any and all copyright interest in the
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# software to the public domain. We make this dedication for the benefit
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# of the public at large and to the detriment of our heirs and
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# successors. We intend this dedication to be an overt act of
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# relinquishment in perpetuity of all present and future rights to this
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# software under copyright law.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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#
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#############################################################################
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#
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# It's still polite to give attribution if you do reuse this code.
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#
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from __future__ import with_statement
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from __future__ import print_function
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__version__ = '2.0'
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import sys, struct, os, traceback
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import zlib
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import zipfile
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import xml.etree.ElementTree as etree
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NSMAP = {'adept': 'http://ns.adobe.com/adept',
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'enc': 'http://www.w3.org/2001/04/xmlenc#'}
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# Wrap a stream so that output gets flushed immediately
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# and also make sure that any unicode strings get
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# encoded using "replace" before writing them.
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class SafeUnbuffered:
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def __init__(self, stream):
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self.stream = stream
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self.encoding = stream.encoding
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if self.encoding == None:
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self.encoding = "utf-8"
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def write(self, data):
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if isinstance(data,unicode):
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data = data.encode(self.encoding,"replace")
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self.stream.write(data)
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self.stream.flush()
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def __getattr__(self, attr):
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return getattr(self.stream, attr)
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try:
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from calibre.constants import iswindows, isosx
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except:
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iswindows = sys.platform.startswith('win')
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isosx = sys.platform.startswith('darwin')
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def unicode_argv():
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if iswindows:
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# Uses shell32.GetCommandLineArgvW to get sys.argv as a list of Unicode
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# strings.
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# Versions 2.x of Python don't support Unicode in sys.argv on
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# Windows, with the underlying Windows API instead replacing multi-byte
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# characters with '?'. So use shell32.GetCommandLineArgvW to get sys.argv
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# as a list of Unicode strings and encode them as utf-8
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from ctypes import POINTER, byref, cdll, c_int, windll
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from ctypes.wintypes import LPCWSTR, LPWSTR
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GetCommandLineW = cdll.kernel32.GetCommandLineW
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GetCommandLineW.argtypes = []
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GetCommandLineW.restype = LPCWSTR
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CommandLineToArgvW = windll.shell32.CommandLineToArgvW
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CommandLineToArgvW.argtypes = [LPCWSTR, POINTER(c_int)]
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CommandLineToArgvW.restype = POINTER(LPWSTR)
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cmd = GetCommandLineW()
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argc = c_int(0)
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argv = CommandLineToArgvW(cmd, byref(argc))
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if argc.value > 0:
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# Remove Python executable and commands if present
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start = argc.value - len(sys.argv)
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return [argv[i] for i in
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xrange(start, argc.value)]
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# if we don't have any arguments at all, just pass back script name
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# this should never happen
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return [u"epubtest.py"]
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else:
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argvencoding = sys.stdin.encoding
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if argvencoding == None:
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argvencoding = "utf-8"
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return arg
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_FILENAME_LEN_OFFSET = 26
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_EXTRA_LEN_OFFSET = 28
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_FILENAME_OFFSET = 30
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_MAX_SIZE = 64 * 1024
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def uncompress(cmpdata):
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dc = zlib.decompressobj(-15)
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data = ''
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while len(cmpdata) > 0:
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if len(cmpdata) > _MAX_SIZE :
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newdata = cmpdata[0:_MAX_SIZE]
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cmpdata = cmpdata[_MAX_SIZE:]
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else:
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newdata = cmpdata
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cmpdata = ''
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newdata = dc.decompress(newdata)
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unprocessed = dc.unconsumed_tail
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if len(unprocessed) == 0:
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newdata += dc.flush()
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data += newdata
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cmpdata += unprocessed
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unprocessed = ''
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return data
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def getfiledata(file, zi):
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# get file name length and exta data length to find start of file data
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local_header_offset = zi.header_offset
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file.seek(local_header_offset + _FILENAME_LEN_OFFSET)
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leninfo = file.read(2)
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local_name_length, = struct.unpack('<H', leninfo)
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file.seek(local_header_offset + _EXTRA_LEN_OFFSET)
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exinfo = file.read(2)
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extra_field_length, = struct.unpack('<H', exinfo)
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file.seek(local_header_offset + _FILENAME_OFFSET + local_name_length + extra_field_length)
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data = None
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# if not compressed we are good to go
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if zi.compress_type == zipfile.ZIP_STORED:
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data = file.read(zi.file_size)
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# if compressed we must decompress it using zlib
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if zi.compress_type == zipfile.ZIP_DEFLATED:
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cmpdata = file.read(zi.compress_size)
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data = uncompress(cmpdata)
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return data
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def encryption(infile):
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# returns encryption: one of Unencrypted, Adobe, B&N and Unknown
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encryption = "Unknown"
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try:
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with open(infile,'rb') as infileobject:
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bookdata = infileobject.read(58)
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# Check for Zip
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if bookdata[0:0+2] == "PK":
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foundrights = False
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foundencryption = False
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inzip = zipfile.ZipFile(infile,'r')
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namelist = set(inzip.namelist())
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if 'META-INF/rights.xml' not in namelist or 'META-INF/encryption.xml' not in namelist:
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encryption = "Unencrypted"
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else:
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rights = etree.fromstring(inzip.read('META-INF/rights.xml'))
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adept = lambda tag: '{%s}%s' % (NSMAP['adept'], tag)
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expr = './/%s' % (adept('encryptedKey'),)
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bookkey = ''.join(rights.findtext(expr))
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if len(bookkey) == 172:
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encryption = "Adobe"
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elif len(bookkey) == 64:
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encryption = "B&N"
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else:
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encryption = "Unknown"
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except:
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traceback.print_exc()
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return encryption
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def main():
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argv=unicode_argv()
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print(encryption(argv[1]))
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return 0
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if __name__ == "__main__":
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sys.stdout=SafeUnbuffered(sys.stdout)
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sys.stderr=SafeUnbuffered(sys.stderr)
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sys.exit(main())
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